Pseudorapidity distributions based on the CDF 630 and 1800 GeV runs from 1987. All data is detector corrected. The data confirms the UA5 measurement of a dN/dη rise with energy faster than ln√s, and as such this analysis is important for constraining the energy evolution of minimum bias and underlying event characteristics in MC simulations. Beam energy must be specified (in GeV) as analysis option "ENERGY" when rivet-merging samples.